Keystones — Lintel
Five GCSE retrieval questions · 28 February 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 65,000,000 in standard form
Answer: 6.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.53cm -
4. Ratio Mixed ratio problems
£203.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £87.00 -
5. Statistics Mean
Calculate the mean of: 6, 21, 24, 30, 50, 50. Give your answer to 2 decimal places
Answer: 30.17